AIM: To explore the application of Pentacam excimer laser epithelial keratomileusis(LASEK)and excimer laser in situ keratomileusis(LASIK)after the changes of posterior corneal surface height.

METHODS: Retrospective analysis of clinical data of 100 patients with myopia by using LASEK and LASIK for the treatment of the 50 patients(100 eyes)in our hospital from January 2013 to June 2013, surface height changes after preoperative and postoperative 3 months were compared by measuring Pentacam corneal analysis system.

RESULTS: Three months after operation, the LASEK posterior corneal surface height was 7.4±5.0mm, significantly higher than 5.6±3.4mm before operation, LASIK posterior corneal surface height was 7.5±5.1mm, significantly higher than 5.5±3.5mm before operation, the differences were statistically significant(P<0.05); 6 months after surgery, two methods of corneal surface height obtained was 1.74±3.67mm and 1.80±3.61mm, there was no significant difference(P>0.05).

CONCLUSION: LASEK and LASIK on corneal posterior surface forward, LASIK is slightly obvious in early period.